Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 290920
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
220 AM PDT SUN MAY 29 2016

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

THE SAT IMAGERY SHOW CLOUDY AREA ACROSS THE NRN AND FAR SRN
WATERS WHILE THE CENTRAL AREA HAS LITTLE CLOUDS TO CLEAR SKIES AND
NO LIGHTNING STRIKES HAVE BEEN REPORTED OVER THE FORECAST REGION.
THE RADAR DOES NOT SHOW ANY TSTMS CELLS OVER THE ENTIRE REGION.
THE SREF MODEL HAS LESS THAN 5 PERCENT CHANCE OF SEV TSTMS. AT
06Z HIGH PRES 1026 MB W OF THE REGION HAS ITS RIDGE INTO MOST OF
THE FORECAST WATERS. A COLD FRONT THAT STRETCHES FROM INLAND LOW
PRES JUST N OF WA LIES ACROSS THE OREGON/CAL WATERS AND IS SLOWLY
MOVING SE. INLAND TROF STILL NEAR THE CA COAST AND CONTINUES TO
SLOWLY WEAKEN. THE PRES GRADIENT IS FAIRLY RELAXED OVER MOST OF
THE REGION EXCEPT OVER THE FAR ERN PARTS OF THE CENTRAL WATERS
WHERE THE WINDS ARE HIGHEST AT 30 KT. THE LATEST ASCAT PASS AT
0600Z SHOW HIGHER WINDS OVR THE ERN PARTS OF THE CENTRAL WATERS.

AN UPPER-LEVEL RIDGE JUST W OF THE REGION HAS BLOCKED MOST OF THE
ENERGY EMBEDDED IN AN UPPER-LEVEL LOW JUST W OF IT FROM REACHING
THE FORECAST REGION. THE RIDGE WILL SLOWLY MOVE E AND BE ACROSS THE
REGION. JUST BEFORE END OF PERIOD THE UPPERLEVEL RIDGE WILL SHIFT
FARTHER E AS IT WEAKENS AND THAT WILL ALLOW SOME ENERGY TO START
MOVING ACROSS THE NRN WATERS. SO THE PRES GRADIENT WILL START TO
TIGHTEN OVER THE NRN WATERS JUST BEFORE END OF FORECAST PERIOD.
THE GLOBAL MODELS HAVE INITIALIZED WELL AND HAVE BEEN VERY
CONSISTENT KEEPING A RIDGE ACROSS THE REGION THEN WEAKEN IT JUST
BEFORE END OF FORECAST PERIOD. SINCE THE DIFFERENCES IN THE
MODELS ARE NOT THAT SIGNIFICANT WILL CONTINUE WITH JUST GFE. IN
THE SHORT TERM THE CLOD FRONT OVER THE NRN WATERS WILL WEAKEN AND
DISSIPATE OVER THE CENTRAL WATERS THEN HIGH PRES RIDGE WILL
DOMINATE MOST OF THE TIME. THE WINDS WILL REMAIN BELOW GALE FORCE
THRESHOLD THROUGH THE FORECAST PERIOD.

.SEAS...11 FT SEAS ARE THE HIGHEST SEAS NEAR THE ERN PARTS OF THE
CENTRAL WATERS. THE SEAS RANGE BETWEEN 3 AND 9 FT OVE MOST OF THE
REGION. THE NWW3 MULTI GRID WAVE MODEL FITS VERY WELL WITH THE
SEAS PATTERN. WILL STAY CLOSE TO ENP.


.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.


.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.



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